107 entries under tough topic. ×
| fierce(adjective, hard, harsh, cruel) | |
| fine-grained(hard, solid, rigid, inflexible) | |
| heavy(hard, solid, rigid, inflexible) | |
| murderous(adjective, hard, harsh, cruel) | |
| nonporous(hard, solid, rigid, inflexible) | |
| sanguinary(adjective, hard, harsh, cruel) | |
| tyrannical(adjective, hard, harsh, cruel) |
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| APA | Smart Define. (2016). hardened thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2016, hardened thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>. |
| MLA | Smart Define. "hardened thesaurus" 29 March 2016. Web. 30 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms> |